/*
 * Copyright (C) 1998 by the FundsXpress, INC.
 * 
 * All rights reserved.
 * 
 * Export of this software from the United States of America may require
 * a specific license from the United States Government.  It is the
 * responsibility of any person or organization contemplating export to
 * obtain such a license before exporting.
 * 
 * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
 * distribute this software and its documentation for any purpose and
 * without fee is hereby granted, provided that the above copyright
 * notice appear in all copies and that both that copyright notice and
 * this permission notice appear in supporting documentation, and that
 * the name of FundsXpress. not be used in advertising or publicity pertaining
 * to distribution of the software without specific, written prior
 * permission.  FundsXpress makes no representations about the suitability of
 * this software for any purpose.  It is provided "as is" without express
 * or implied warranty.
 * 
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 */

#include "k5-int.h"

void krb5_dk_encrypt_length
(const struct krb5_enc_provider *enc,
		const struct krb5_hash_provider *hash,
		size_t input, size_t *length);

krb5_error_code krb5_dk_encrypt
(const struct krb5_enc_provider *enc,
		const struct krb5_hash_provider *hash,
		const krb5_keyblock *key, krb5_keyusage usage,
		const krb5_data *ivec,
		const krb5_data *input, krb5_data *output);

void krb5int_aes_encrypt_length
(const struct krb5_enc_provider *enc,
		const struct krb5_hash_provider *hash,
		size_t input, size_t *length);

krb5_error_code krb5int_aes_dk_encrypt
(const struct krb5_enc_provider *enc,
		const struct krb5_hash_provider *hash,
		const krb5_keyblock *key, krb5_keyusage usage,
		const krb5_data *ivec,
		const krb5_data *input, krb5_data *output);

krb5_error_code krb5_dk_decrypt
(const struct krb5_enc_provider *enc,
		const struct krb5_hash_provider *hash,
		const krb5_keyblock *key, krb5_keyusage usage,
		const krb5_data *ivec, const krb5_data *input,
		krb5_data *arg_output);

krb5_error_code krb5int_aes_dk_decrypt
(const struct krb5_enc_provider *enc,
		const struct krb5_hash_provider *hash,
		const krb5_keyblock *key, krb5_keyusage usage,
		const krb5_data *ivec, const krb5_data *input,
		krb5_data *arg_output);

krb5_error_code krb5int_dk_string_to_key
(const struct krb5_enc_provider *enc, 
		const krb5_data *string, const krb5_data *salt,
		const krb5_data *params, krb5_keyblock *key);

krb5_error_code 
krb5int_dk_prf(const struct krb5_enc_provider *enc,
	       const struct krb5_hash_provider *hash,
	       const krb5_keyblock *key, const krb5_data *in, krb5_data *out);

krb5_error_code krb5_derive_key
(const struct krb5_enc_provider *enc,
		const krb5_keyblock *inkey,
		krb5_keyblock *outkey, const krb5_data *in_constant);

krb5_error_code krb5_dk_make_checksum
(const struct krb5_hash_provider *hash,
		const krb5_keyblock *key, krb5_keyusage usage,
		const krb5_data *input, krb5_data *output);

krb5_error_code
krb5int_dk_make_checksum_iov(const struct krb5_hash_provider *hash,
		          const krb5_keyblock *key, krb5_keyusage usage,
			  const krb5_crypto_iov *data, size_t num_data,
			  krb5_data *output);

krb5_error_code
krb5_derive_random(const struct krb5_enc_provider *enc,
		   const krb5_keyblock *inkey, krb5_data *outrnd,
		   const krb5_data *in_constant);

/* AEAD */

extern const struct krb5_aead_provider krb5int_aead_dk;
extern const struct krb5_aead_provider krb5int_aead_aes;

/* CCM */

void
krb5int_ccm_encrypt_length(const struct krb5_enc_provider *enc,
			   const struct krb5_hash_provider *hash,
			   size_t inputlen, size_t *length);

extern const struct krb5_aead_provider krb5int_aead_ccm;

krb5_error_code krb5int_ccm_encrypt
(const struct krb5_enc_provider *enc,
		const struct krb5_hash_provider *hash,
		const krb5_keyblock *key, krb5_keyusage usage,
		const krb5_data *ivec, const krb5_data *input,
		krb5_data *arg_output);

krb5_error_code krb5int_ccm_decrypt
(const struct krb5_enc_provider *enc,
		const struct krb5_hash_provider *hash,
		const krb5_keyblock *key, krb5_keyusage usage,
		const krb5_data *ivec, const krb5_data *input,
		krb5_data *arg_output);